F17 External Monitor on 945GM

[Andrew Haley]

On 07/24/2012 02:33 PM, Philippe LeCavalier wrote:
> On Tue, Jul 24, 2012 at 9:02 AM, Andrew Haley <aph at redhat.com> wrote:
> 
>> On 07/24/2012 01:24 PM, Philippe LeCavalier wrote:
>>>>> video chipset:
>>>>> 00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS,
>>>>> 943/940GML Express Integrated Graphics Controller (rev 03)
>>>>> 00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME,
>>>>> 943/940GML Express Integrated Graphics Controller (rev 03)
>>>>>
>>>>> packages:
>>>>> gnome-shell 3.4.1
>>>>> kernel 3.4.0-1.fc17.i686
>>>>>
>>> Anyone?
>>>
>>
>> What does xrandr say?  What happens after ctrl-alt-bksp?  Is this GNOME
>> specific?
> 
> 
> Thanks for responding Andrew. I appreciate the assistance.
> 
> ctrl-alt-bksp only helps recovery prior top unchecking mirror displays.
> After that, ctrl-alt-bksp leaves me with either 2 black screens or a
> blacked out monitor and oscillating/flickering LCD.
> 
> Xrandr LCD only
> 
>  $ sudo xrandr
> Swipe your right index finger on UPEK TouchStrip
> Screen 0: minimum 320 x 200, current 1280 x 800, maximum 4096 x 4096
> LVDS1 connected 1280x800+0+0 (normal left inverted right x axis y axis) 0mm
> x 0mm
>    1280x800       60.0*+
>    1024x768       60.0
>    800x600        60.3     56.2
>    640x480        59.9
> VGA1 disconnected (normal left inverted right x axis y axis)
> TV1 disconnected (normal left inverted right x axis y axis)
> 
> Xrandr LCD+MONITOR
> $ sudo xrandr
> Screen 0: minimum 320 x 200, current 1024 x 768, maximum 4096 x 4096
> LVDS1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm
> x 0mm
>    1280x800       60.0 +
>    1024x768       60.0*
>    800x600        60.3     56.2
>    640x480        59.9
> VGA1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm
> x 0mm
>    1024x768       60.0*
>    800x600        60.3     56.2
>    848x480        60.0
>    640x480        59.9
> TV1 unknown connection (normal left inverted right x axis y axis)
>    848x480        59.9 +
>    640x480        59.9 +
>    1024x768       59.9
>    800x600        59.9

OK, so it does see your display.  That's good.

I couldn't get my laptop to recognize the external monitor without a
ctrl-alt-bksp to scan the monitors.  Now have a look in /var/log/Xorg.0.log
and we can see what's happening.

Try a few things like

xrandr --auto --output VGA1 --same-as LVDS1

Andrew.